The 20 Most Important Things in Life*

  1. Grammar and its Parts.
  2. Rhetoric and Dialectic.
  3. Mathematics, whose parts are Arithmetic, Music, Geometry, and Astronomy.
  4. Medicine.
  5. Laws and the instruments of the Judiciary, and times.
  6. The order of Scripture, cycles and canons, liturgical feasts and offices.
  7. God and angels, prophetic nomenclature, names of the holy fathers, martyrs, clerics, monks, and other names.
  8. Church and synagogue, religion and faith, heresies, philosophers, poets, sibyls, magicians, pagans, gods of the gentiles.
  9. Languages of the Nations, Royalty, Military, and Civic Terminology, Family Relationships.
  10. Certain terms in Alphabetical Order.
  11. Human beings and their parts, the ages of humans, portents and metamorphoses.
  12. Four-footed animals, creeping animals, fish, and flying animals.
  13. Elements, that is, the heavens and the air, waters, the sea, rivers and floods.
  14. Earth, paradise, the regions of the whole globe, islands, mountains, other terms for places, and the lower regions of the earth.
  15. Cities, urban and rural buildings, fields, boundaries and measures of fields, roads.
  16. Earthy materials from land or water, every kind of gem and precious and base stones, ivory likewise, treated along with marble, glass, all the metals, weights and measures.
  17. Agriculture, crops of every kind, vines and trees of every kind, herbs and all vegetables.
  18. Wars and triumphs and the instruments of war, the Forum, spectacles, games of chance and ball games.
  19. Ships, ropes, and nets, iron workers, the construction of walls and all the implements of building, also wool-working, ornaments, and all kinds of clothing.
  20. Tables, foodstuffs, drink, and their vessels, vessels for wine, water, and oil, vessels of cooks, bakers, and lamps, beds, chairs, vehicles, rural and garden implements, equestrian equipment.

*According to Isidore of Seville Etymologiae & Source: All the Knowledge in the World, by Simon Garfield.